These problems usually happen because of blocked breathing passages or because the cancer has spread farther into the lung, nearby areas, or other parts of the body.

Call Your Doctor If: You get any symptoms listed that suggest lung disease, like those listed above, especially an ongoing cough, blood-streaked mucus, wheezing, hoarseness, or a lung infection that keeps coming back. You’ll get a thorough checkup, and you may also get X-rays or other tests.